Lithium titanate composite material, preparation method thereof, and application thereof

Lithium titanate composite material, preparation method thereof, and application thereof

CN
  • CN 102,468,485 B
  • Filed: 11/04/2010
  • Issued: 06/11/2014
  • Est. Priority Date: 11/04/2010
  • Status: Active Grant
First Claim
Patent Images

1. a lithium titanate composite material preparation method, comprises the steps:

  • Press lithium, titanium and metal M mol ratio 4;

    5-x;

    x the oxide of the source compound of lithium, titanium dioxide and metal M is mixed, grind 1-10 hour, at 400-900 ℃

    of temperature, calcine 1-16 hour in air, obtaining chemical composition is Li 4ti 5-xm xo 12nanoparticle, 0.001≤

    x <

    5, M is transition metal, in described transition metal chosen from Fe, cobalt, chromium, nickel, copper more than one;

    By described nanoparticle and organic carbon source monomer, mix and blend in solvent reacts 20 minutes-2 hours, obtains the coated lithium titanate nanoparticle of organic carbon source monomer;

    Described organic carbon source monomer clad nano particulate and graphene oxide are mixed in solvent, and stirring reaction obtains mixed solution;

    Dry described mixed solution, grinding are obtained to lithium titanate composite material precursor;

    Described lithium titanate composite material precursor, in reducing atmosphere and 400-1000 ℃

    of temperature lower calcination 1-24 hour, is obtained to lithium titanate composite material, and wherein, the programming rate that rises to 400-1000 ℃

    is 2-10 ℃

    /min;

    Described lithium titanate composite material comprises Graphene and nanoscale metatitanic acid lithium particulate, and described nanoscale metatitanic acid lithium particulate outer surface has Graphene described in carbon coating layer to be distributed in described carbon coating layer outside.

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